A good paper will analyze a course in terms of two or three of the most central ideas from the book, in depth, supported with specific details, both objective and subjective (your experience as a student is highly relevant). You do not have to agree with the book in order to write an analysis from its perspective, but you do have to engage seriously with it. For one possible example, one of the important ideas in Zull's book is the learning cycle. If you are analyzing a course from the perspective of this idea, you can start by identifying the way s in which the course did or did not lead you as a student to move through all par ts of the learning cycle, go on to talk about how this should have (according to Zull's model) affected your learning, and conclude by talking about whether your experience agrees with this model, and why or why not.